> Git lets you rewrite history Not quite true. Git makes it possible to hard fork it’s internal commit tree, and easily move the HEAD marker to your new fork.

> Git lets you rewrite history Not quite true. Git makes it possible to hard fork it’s internal commit tree, and easily move the HEAD marker to your new fork. But it’s obvious to everyone observing the tree that the modification has happened. Same applies to all normal blockchains. Only difference is that blockchain clients will ignore that fork if the correct proof work hasn’t been provided, but you could add that to a git commit if you really wanted too. The git commit tree is cryptographically signed, every commit is identified by its cryptographic hash, and that has is taken from the content of the commit, which includes the hash of the parent commits. So you can cryptographically prove that a specific git tree is properly linked together, and the each individual commit hasn’t been tampered with. The ability to detect tampered commits, and observe forks is all you really need for a blockchain. Everything else is just deciding how you determine which branch is the “real” branch. But you don’t need proof of work for that, it could be enforced by courts or governments the old fashioned way. As for your PR stuff. You can fix that by publishing an agreed set of valid commit types, which limits the types of modifications that are allowable. Then when validating a tree, you ignore commits that don’t meet that specification (just like more traditional blockchains do). Ultimately the only novel thing blockchains bring to the table is proof of work algorithms etc which allow for supposedly decentralised trust. But decentralised trust doesn’t really exist when dealing with physical assets. At the end of the day ownership is determined by your ability to physically defend your assets, or ability to convince the state to defend them on your behalf. So if the state says you don’t own your house (and the courts agree), then the content of your decentralised blockchain is irrelevant because it won’t stop the police from forcibly evicting you.